Speed-changing mechanism.



H. W. VAN LEIR (Q U. D. GARVER. SPEED CHANGlNG MECHANISM.

APPHCATION FILED JULY 16. 1914 Patented July 27, 1915 4 SHEETS-SHEET I.

H. w. VAN LEIR & u. n. GARVER.

SPEED CHANGING MECHANISM.

APPUCATION FILED JULY 16. 19M.

mwm 121mm July 27, 1915.

4 SHEETS-SHEET 2.

H! II Hill unless W. VAN LEIR AND URIAPI TI).

SAID GARVEB .dfiSZGEOR Ti) filjltllll VAN LEIE.

sun -Mm Specification of Letters Patent.

Patented July 2?, 19155 Application filed July 16, 131%. Serial H0. 851,339.

,ing gears, are employed, the objects of our invention being to insure the disengagement of one set of gears before another set of gears can. he moved into engagement and to nherent engagement of either set of gears the controlling device has been. properly set to effect one or other of the various combinations.

"These hereinafter set forth, reference being had to he accompanying drawings, in which our mention has been shown as applied to the ed changing mechai'iisin of a motor car,

hose parts of the gear selecting and shiftnieohanisni to which our invention paricularly relates; Fig. 2 a top or plan VlOW of the saline, partly in section; Fig. 3 a sec ti on on the line a e, Fig. 2, looking in the direction of. the arrow; Figs. 4:, 5, 6 and 7 views oi? the change gears in the respective operative positions assumed by them; Fig. 8 a plan or top view of the selecting and gear "shitting devices in the positions assumed by them in order to adjust the gears to the inoperative or neutral position shown in Fig. Figs. 9, 10, lland 12 similar views showing the gear selecting and gear shitting devices in the positions assumed by them. in order to adjust the gears to the dif- .fe out operative, positions shown in Figs. 4;, t), {5 and '7, respectively; Fig. a view, partly in elevatlon and partly in longitud1-' rial section., through thogear selecting and shii devices; Fig. 14 a view, partly in elevation and partly in transverse section, on the line Z), Fig. 13, looking in the direction of the arrow cc; .Fig 15 a view, partly in elevation and partly in transverse section, on the line -0, Fig. 13., looking in the direction of the arrow 11/; Fi 1G a perspective view of the gear selecting device and Figs. 17 and 18 perspectiveevievvs of he gear shifting devices.

Referring in the first instance to F 3.

objects we attain. in the manner figure i being a diagrammatic View, partly 11 section and partly in elevation, showing the which ring comprising a disk 13 secured to the rear 2 and 3 oi the drawings, 1 and 2 represent the forward and rear portions of the on glue shat? or the car between which are interposed the i'iieii'ibers 3 and 3 of a clutch,

these members being normally moved into engaging relation with one another by means oi? the spring and'heinir separated so as to disconnect the two sections of the engine shaft by means of a clutch pedal which is mounted upon a shaft 5, the latter being also provided with arms carrying rollers which bear upon the outer face of the hub of the member 3"" or the clutch, as shown in 1 and The shaft 5 is also provided With an arm. 6 having pivotal connection with one end of a sleeve 7 which embraces a shaft 8 and is free to slide longitudinally thereon a coiled spring 9 inter posed between a collar 8 on the slia ft and a collar 7 on the sleeve serving to transmit longitudinal movement from the sleeve to the shaft when said sleeve is moved rear- Wardly by the arm 3 on such ope 'ation of the clutch pedal 5 as will disconnect the. clutch members 3 and 3.

Besides being moved longitudinally in the manner described the shaft 8 can also have movement of, partial rotation imparted to it by arenas of an indicator arm operat ing in conjunction with a dial 10 and car-- ried. by the upper end of a shaft 10? which is mounted in bearings so disposed that the indicator arm 10 will be located in a position. convenient for numipulation by the driver of the car, preferably in a position adjacent to the steering wheel. The lower end of the shaft 10 is connected, by means of bevel Wheels and 10, or equivalent connections, to a horizontal shaft 11 which is provided at its rear end with an arm 11, the latter being connected by a link ll to an arm ll. Whose hub is splined upon or otherwise connected to the shaft 8 so as to impart movements of partial rotation there to Without interfering with the longitudinal movement thereof. The shaft 8 is provided at its rear end with means for imparting both longitudinal and lateral reciprocating movemeiit to a selector head 12, and various means may be employed. for this purpose,

a l have shown in the drawend of the shaft '8 and fitting ina grooved or slotted portion of the selector liead so as to cause the latter to move iongitudinally with the shaft, said disk having crank pins 13 engaging with slots 13 in the selector head so that movement of rotation of the shaft 8 in either direction will cause corof the machine.

The number and character of the speed changing gears employed will depend largely upon the number of different speeds which it is desired to provide for. The gears which we have shown in the present instance are intended to provide for three speeds ahead and one reverse, and are as follows: Secured to the engine shaft 2 is a spur wheel 32 which meshes with a spur wheel 33 on a counter-shaft 34:, the latter also having three other spur wheels 35, 36 and 37 differing in diameter from each other, the spur wheel 37 meshing with a pinion 38 which is free to turn on a stud 39 in the gear case X. The inner end of the transmission shaft 20 has a bearing in the end of the shaft 2 which is bored out for this purpose, and splined or otherwise mounted upon the transmission shaft so as to be free to move longitudinally thereon but incapable of rotating independently thereof, are shifting gears a and b, the gear a beingalso provided with a clutch member 30 which is adapted to engage with a clutch member 31 on the face of the engine shaft spur wheel 32, as shown in Figs. 1 and 2.

Each of the gears a and b is capable of assuming three different positions on 'the transmission shaft 20, depending upon the character of the movement to be imparted to said shaft or whether any movement at all is to be imparted thereto, and we will now describe the means whereby the movements of the gears a and Z) are effected by theaction of the arms of the selector 12 upon the shifters A and B.

Each of the shifting devices A and B has above the center shifting dogs 14: and lock ing dogs 14 for the action of the upper arm 14: of the selector head and below the center shifting dogs 15 and locking dogs 15 for the action of the lower arm 15 of said se lector head. The shifter A has upper and selector head, andthe shifter B has upper and lower neutralizing dogs 18 for the action of the upper and lower arms 18 of the selector head. The shifting dogs 14 and 15 project forwardly beyond the locking dogs 14' and 15 and said dogs are reversed in position laterally, that is to say, the upper shifting dog 14 is in line laterally with the lower locking dog 15 and the lower shifting dog 15* is in line laterally with the upper locking dog 14:", the neutralizing dogs 16 and 18 being laterally out of line with the dogs 14, 14, 15 and 15".

The shifter A is employed in connection with the shifting gear a and is connected thereto by the following means: The shifter A is secured to a shaft 22 which is mounted at one end in a bearing in the casing 24 and at the other end in a sleeve 23 which in turn is mounted in said casing 24, the end of the shaft 22 projecting beyond the sleeve 23 and being provided with an arm 22 which is connected by a link 22 to a bar 25 mounted so as to be free to slide in the gear case X and having an arm 25 which engages the grooved hub of the shifting gear a, as shown in Fig. 2. In like manner the shifter B is secured to the sleeve 23 and the latter has at its outer end an arm 23 which is connected by a link 23 'to a bar 26, likewise mounted so as to slide in the gear case X and having an arm 26 which engages the grooved hub of the shifting gear In the following descriptionof the operation of the mechanism the terms right and left are assumed to be right and left in respect to the driver of the car facing the indicator in Figs. 1 and 2.

When both the gears a and b are in the intermediate or neutral position shown in Fig. 2, the indicator arm- 10 is likewise in the central or neutral position shown in said figure, the selector head also occupies a central position so that if it is moved rearwardly, as shown in Fig. 8, while in this position the arms 14 and 15 will pass between the shifters A and B and will have no effect thereon. The arms 16 and 18 are then in position to act upon the dogs 16* and 18 but the latter are in the intermediate position shown in Fig. 13 and the arms 16 and 18 will clear the same.

If the indicator arm 10 is moved from the central or neutral position one point to the left to indicate first speed ahead the selector head will be'moved one step to the left from its central or neutral position so as to bring its lower arm 15 into line with the lower dog 15" and its upper arm 14 into line with the upper dog 11", consequently, when the selector head is moved rearwardly, as shown in Fig. 9, the shifter B will, by reason of the contact of the lower arm 15 with the dog 15*, be moved in the direction of the construction, as our invention may, by simple multiplication of parts, be applied to cars having a greater number of speeds, or the invention may be applied to speed changers generally 'Wherever they may be used.

We claim:

1. The combination, in a speed changing device,-of a gear train having a movable member, and a shifting device for said movable member comprising a rocking element connected to said movable member, and a selector movable from and toward said rocking element, the latter andithe selector having on opposite sides of the axis of the rocking element engaging members, the engaging member on one side of the axis of: the rocking element projecting to a greater extent than the engaging member on the opposite side thereof.

2. The combination, in a speed changing device, of a gear train having a movable member, and a shifting device for said movable member comprising a rocking element connected to said member, and a selector movable from and toward said rocking element and also movable laterally in respect thereto, said rocking element and selector having engaging members on opposite sides having dogs corresponding to tlof the axis of the rocking element, and one of said parts having the engaging elements on each sideof-the axis disposed in pairs one alongside of the other, one of a pair projecting to a greater extent than the other, and the engaging element of greatest pro jection on one side of the axis being in line with the engaging element of least projection on the opposite side of said axis.

3. The combination, in a speed changing device, of a plurality of gears, a member movable into engagement with either, a shifting device for said movable member dil'lerent n positions, thereof, and a movable selector adapted to engage with either of said dogs to shift the movable member to its difi'erent positions, and other dogs carried by the shifter and serving to engage said selector so as to stop further movement of the same when the desired shift-of the movable member has been effected.

4. The combination, in a speed changing device, of a gear train having a movable member, and a shifting device for said movable member comprising a rocking element connected to said movable member, and a selector movable from and toward said rocking element, two laterally separated sets of engaging elements on said rocking element ,and selector, each set of engaging elements having members on opposite sides of the axis of the rocking element, and the members of one set projecting to a greater extent on one side of the axis than on the other side of the same.

5. The combination, in a speed changing device, of a gear train havlng a movable member, and a shifting device for said movable member comprising a rocking element connected to said member, and a selector movable from and toward said rocking element, and also movable laterally in respect thereto, said rocking element and selector each having two sets of laterally separated engaging elements, each having members on opposite sides of the axis of the rocking element, one set of engaging elements being disposed in pairs one alongside of the other and one element of each pair projecting to a greater extent than the other, the engaging element of greatest projection on one side of the axis being in line with the engaging element of least projection on the opposite side of said axis.

6. The combination, in a speed changing device, of a gear train having two movable members, two shifting devices, one for each of said movable members, and each comprising a rocking element having thereon shifting dogs and neutralizing and locking dogs, and a selector movable from and toward said rocking elements and having two sets of arms so disposed that one set will act upon the neutralizing and locking dogs of one rocking element before the other set acts upon the shifting dogs of the other rocking element. v

7. The combination, in a speed changing device, of a gear train havin a plurality of movable members, shifting evices, one for each of said mo able members and comprising a plurality of rocking elements disposed side by side and each or. inected to its corre'' sponding movable member of the gear train, and each having a set of shifting dogs and a set of neutralizing and locking dogs, and a selector movable from and toward said rocking elements and also movable laterally in respect thereto, said selector having central arms for acting upon the shifting dogs of either of said rocking elements and s de arms, those on one side acting on the neutralizing and locking dogs of one rocking element and those 'on the other side acting on the neutralizing and locking dogs of the other rocking element.

In testimony whereof, We have signed our names to this specification, in the presence of two subscribing witnesses.

HENRY W. VAN LEIR. URIAH D. GARVER.

Witnesses:

KATE A. BEADLE, HAMILTON D. TURNER. 

